The Dynamics Emulational Analysis Of Double Link Jib System Of Portal Crane Based On Virtual Prototype

With the development of ports, the requirement of port machinery is higher and higher. So design calculation method of loading and unloading machine need to be renewed, substantiated and consummated constantly to make port machinery more functional, economic, reliable and safe. For a long time, the design method of loading and unloading machine of port mostly adopts the static design and has no valid method of dynamic emulation. Adopting technique of virtual prototype in study of port machinery can realize emulation that the running state of each mechanism under various working conditions which varies according to load and the process which varies according to time. Results from the emulation are used to estimate and judge different data of actual movement. It also has some reference value for the dynamic anasysis and caculation of port machinery. What have mentioned above provide the foundation for emulation design study of crane and provide technique support for the creative design and optimization of crane. It plays an important part in quickening the development cycle and reducing the cost.This paper bases on the technique of virtual prototype and utilizes software platform of ADAMS to establish three-dimensional digitized virtual prototype of double link jib system of portal crane and systematically do its analysis of dynamics emulation of multi-body system. It realizes that emulation of double link jib system under different working conditions. Related data that is got in the emulational analysis offers effective methods on dynamic design of double link jib system of portal crane. Main contents of the paper are as follows:It establishes related dynamics models and ascertains dynamics load under different working conditions according to dynamics theories; Adopt three-dimens _ional solid modeling software of UG to establish three-dimensional models of double link jib system and lead them to software of ADAMS. Then, add loads and force on every component and do theirs analysis of dynamics emulation of multi-body system; Do modal analysis on jib system to find out dynamic features of jib, extract free frequency of first few phases and main mode figures and do their analysis; Use bi-directional interface between software of Ansys and software of ADAMS to make jib flexible and establish rigid coupling virtual prototype of doublelink jib system. Finally, study the dynamic emulation of rigid coupling system.In a word, virtual prototype study of double link jib system of portal crane is a trial that apply advanced design, analysis, emulation techniques in design of portal crane and offers efficient tool and method to design portal crane that is economic, credible, stable and high performance.